22 files changed, 871 insertions, 810 deletions

diff --git a/fs/xfs/linux-2.6/kmem.h b/fs/xfs/linux-2.6/kmem.h
index c64a29cdfff3..f0268a84e6fd 100644
--- a/fs/xfs/linux-2.6/kmem.h
+++ b/fs/xfs/linux-2.6/kmem.h
@@ -23,17 +23,8 @@
 #include <linux/mm.h>
 
 /*
- * memory management routines
+ * Process flags handling
  */
-#define KM_SLEEP	0x0001u
-#define KM_NOSLEEP	0x0002u
-#define KM_NOFS		0x0004u
-#define KM_MAYFAIL	0x0008u
-
-#define	kmem_zone	kmem_cache
-#define kmem_zone_t	struct kmem_cache
-
-typedef unsigned long xfs_pflags_t;
 
 #define PFLAGS_TEST_NOIO()              (current->flags & PF_NOIO)
 #define PFLAGS_TEST_FSTRANS()           (current->flags & PF_FSTRANS)
@@ -67,74 +58,102 @@ typedef unsigned long xfs_pflags_t;
 	*(NSTATEP) = *(OSTATEP);	\
 } while (0)
 
-static __inline gfp_t kmem_flags_convert(unsigned int __nocast flags)
+/*
+ * General memory allocation interfaces
+ */
+
+#define KM_SLEEP	0x0001u
+#define KM_NOSLEEP	0x0002u
+#define KM_NOFS		0x0004u
+#define KM_MAYFAIL	0x0008u
+
+/*
+ * We use a special process flag to avoid recursive callbacks into
+ * the filesystem during transactions.  We will also issue our own
+ * warnings, so we explicitly skip any generic ones (silly of us).
+ */
+static inline gfp_t
+kmem_flags_convert(unsigned int __nocast flags)
 {
-	gfp_t	lflags = __GFP_NOWARN;	/* we'll report problems, if need be */
+	gfp_t	lflags;
 
-#ifdef DEBUG
-	if (unlikely(flags & ~(KM_SLEEP|KM_NOSLEEP|KM_NOFS|KM_MAYFAIL))) {
-		printk(KERN_WARNING
-		    "XFS: memory allocation with wrong flags (%x)\n", flags);
-		BUG();
-	}
-#endif
+	BUG_ON(flags & ~(KM_SLEEP|KM_NOSLEEP|KM_NOFS|KM_MAYFAIL));
 
 	if (flags & KM_NOSLEEP) {
-		lflags |= GFP_ATOMIC;
+		lflags = GFP_ATOMIC | __GFP_NOWARN;
 	} else {
-		lflags |= GFP_KERNEL;
-
-		/* avoid recusive callbacks to filesystem during transactions */
+		lflags = GFP_KERNEL | __GFP_NOWARN;
 		if (PFLAGS_TEST_FSTRANS() || (flags & KM_NOFS))
 			lflags &= ~__GFP_FS;
 	}
-
-        return lflags;
+	return lflags;
 }
 
-static __inline kmem_zone_t *
+extern void *kmem_alloc(size_t, unsigned int __nocast);
+extern void *kmem_realloc(void *, size_t, size_t, unsigned int __nocast);
+extern void *kmem_zalloc(size_t, unsigned int __nocast);
+extern void  kmem_free(void *, size_t);
+
+/*
+ * Zone interfaces
+ */
+
+#define KM_ZONE_HWALIGN	SLAB_HWCACHE_ALIGN
+#define KM_ZONE_RECLAIM	SLAB_RECLAIM_ACCOUNT
+#define KM_ZONE_SPREAD	0
+
+#define kmem_zone	kmem_cache
+#define kmem_zone_t	struct kmem_cache
+
+static inline kmem_zone_t *
 kmem_zone_init(int size, char *zone_name)
 {
 	return kmem_cache_create(zone_name, size, 0, 0, NULL, NULL);
 }
 
-static __inline void
+static inline kmem_zone_t *
+kmem_zone_init_flags(int size, char *zone_name, unsigned long flags,
+		     void (*construct)(void *, kmem_zone_t *, unsigned long))
+{
+	return kmem_cache_create(zone_name, size, 0, flags, construct, NULL);
+}
+
+static inline void
 kmem_zone_free(kmem_zone_t *zone, void *ptr)
 {
 	kmem_cache_free(zone, ptr);
 }
 
-static __inline void
+static inline void
 kmem_zone_destroy(kmem_zone_t *zone)
 {
 	if (zone && kmem_cache_destroy(zone))
 		BUG();
 }
 
-extern void *kmem_zone_zalloc(kmem_zone_t *, unsigned int __nocast);
 extern void *kmem_zone_alloc(kmem_zone_t *, unsigned int __nocast);
+extern void *kmem_zone_zalloc(kmem_zone_t *, unsigned int __nocast);
 
-extern void *kmem_alloc(size_t, unsigned int __nocast);
-extern void *kmem_realloc(void *, size_t, size_t, unsigned int __nocast);
-extern void *kmem_zalloc(size_t, unsigned int __nocast);
-extern void  kmem_free(void *, size_t);
+/*
+ * Low memory cache shrinkers
+ */
 
 typedef struct shrinker *kmem_shaker_t;
 typedef int (*kmem_shake_func_t)(int, gfp_t);
 
-static __inline kmem_shaker_t
+static inline kmem_shaker_t
 kmem_shake_register(kmem_shake_func_t sfunc)
 {
 	return set_shrinker(DEFAULT_SEEKS, sfunc);
 }
 
-static __inline void
+static inline void
 kmem_shake_deregister(kmem_shaker_t shrinker)
 {
 	remove_shrinker(shrinker);
 }
 
-static __inline int
+static inline int
 kmem_shake_allow(gfp_t gfp_mask)
 {
 	return (gfp_mask & __GFP_WAIT);
diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c
index 74d8be87f983..97fc056130eb 100644
--- a/fs/xfs/linux-2.6/xfs_aops.c
+++ b/fs/xfs/linux-2.6/xfs_aops.c
@@ -43,7 +43,29 @@
 #include <linux/pagevec.h>
 #include <linux/writeback.h>
 
-STATIC void xfs_count_page_state(struct page *, int *, int *, int *);
+STATIC void
+xfs_count_page_state(
+	struct page		*page,
+	int			*delalloc,
+	int			*unmapped,
+	int			*unwritten)
+{
+	struct buffer_head	*bh, *head;
+
+	*delalloc = *unmapped = *unwritten = 0;
+
+	bh = head = page_buffers(page);
+	do {
+		if (buffer_uptodate(bh) && !buffer_mapped(bh))
+			(*unmapped) = 1;
+		else if (buffer_unwritten(bh) && !buffer_delay(bh))
+			clear_buffer_unwritten(bh);
+		else if (buffer_unwritten(bh))
+			(*unwritten) = 1;
+		else if (buffer_delay(bh))
+			(*delalloc) = 1;
+	} while ((bh = bh->b_this_page) != head);
+}
 
 #if defined(XFS_RW_TRACE)
 void
@@ -54,7 +76,7 @@ xfs_page_trace(
 	int		mask)
 {
 	xfs_inode_t	*ip;
-	vnode_t		*vp = LINVFS_GET_VP(inode);
+	vnode_t		*vp = vn_from_inode(inode);
 	loff_t		isize = i_size_read(inode);
 	loff_t		offset = page_offset(page);
 	int		delalloc = -1, unmapped = -1, unwritten = -1;
@@ -81,7 +103,7 @@ xfs_page_trace(
 		(void *)((unsigned long)delalloc),
 		(void *)((unsigned long)unmapped),
 		(void *)((unsigned long)unwritten),
-		(void *)NULL,
+		(void *)((unsigned long)current_pid()),
 		(void *)NULL);
 }
 #else
@@ -192,7 +214,7 @@ xfs_alloc_ioend(
 	ioend->io_uptodate = 1; /* cleared if any I/O fails */
 	ioend->io_list = NULL;
 	ioend->io_type = type;
-	ioend->io_vnode = LINVFS_GET_VP(inode);
+	ioend->io_vnode = vn_from_inode(inode);
 	ioend->io_buffer_head = NULL;
 	ioend->io_buffer_tail = NULL;
 	atomic_inc(&ioend->io_vnode->v_iocount);
@@ -217,7 +239,7 @@ xfs_map_blocks(
 	xfs_iomap_t		*mapp,
 	int			flags)
 {
-	vnode_t			*vp = LINVFS_GET_VP(inode);
+	vnode_t			*vp = vn_from_inode(inode);
 	int			error, nmaps = 1;
 
 	VOP_BMAP(vp, offset, count, flags, mapp, &nmaps, error);
@@ -462,28 +484,37 @@ xfs_add_to_ioend(
 }
 
 STATIC void
+xfs_map_buffer(
+	struct buffer_head	*bh,
+	xfs_iomap_t		*mp,
+	xfs_off_t		offset,
+	uint			block_bits)
+{
+	sector_t		bn;
+
+	ASSERT(mp->iomap_bn != IOMAP_DADDR_NULL);
+
+	bn = (mp->iomap_bn >> (block_bits - BBSHIFT)) +
+	      ((offset - mp->iomap_offset) >> block_bits);
+
+	ASSERT(bn || (mp->iomap_flags & IOMAP_REALTIME));
+
+	bh->b_blocknr = bn;
+	set_buffer_mapped(bh);
+}
+
+STATIC void
 xfs_map_at_offset(
 	struct buffer_head	*bh,
 	loff_t			offset,
 	int			block_bits,
 	xfs_iomap_t		*iomapp)
 {
-	xfs_daddr_t		bn;
-	int			sector_shift;
-
 	ASSERT(!(iomapp->iomap_flags & IOMAP_HOLE));
 	ASSERT(!(iomapp->iomap_flags & IOMAP_DELAY));
-	ASSERT(iomapp->iomap_bn != IOMAP_DADDR_NULL);
-
-	sector_shift = block_bits - BBSHIFT;
-	bn = (iomapp->iomap_bn >> sector_shift) +
-	      ((offset - iomapp->iomap_offset) >> block_bits);
-
-	ASSERT(bn || (iomapp->iomap_flags & IOMAP_REALTIME));
-	ASSERT((bn << sector_shift) >= iomapp->iomap_bn);
 
 	lock_buffer(bh);
-	bh->b_blocknr = bn;
+	xfs_map_buffer(bh, iomapp, offset, block_bits);
 	bh->b_bdev = iomapp->iomap_target->bt_bdev;
 	set_buffer_mapped(bh);
 	clear_buffer_delay(bh);
@@ -616,7 +647,7 @@ xfs_is_delayed_page(
 				acceptable = (type == IOMAP_UNWRITTEN);
 			else if (buffer_delay(bh))
 				acceptable = (type == IOMAP_DELAY);
-			else if (buffer_mapped(bh))
+			else if (buffer_dirty(bh) && buffer_mapped(bh))
 				acceptable = (type == 0);
 			else
 				break;
@@ -1040,8 +1071,159 @@ error:
 	return err;
 }
 
+/*
+ * writepage: Called from one of two places:
+ *
+ * 1. we are flushing a delalloc buffer head.
+ *
+ * 2. we are writing out a dirty page. Typically the page dirty
+ *    state is cleared before we get here. In this case is it
+ *    conceivable we have no buffer heads.
+ *
+ * For delalloc space on the page we need to allocate space and
+ * flush it. For unmapped buffer heads on the page we should
+ * allocate space if the page is uptodate. For any other dirty
+ * buffer heads on the page we should flush them.
+ *
+ * If we detect that a transaction would be required to flush
+ * the page, we have to check the process flags first, if we
+ * are already in a transaction or disk I/O during allocations
+ * is off, we need to fail the writepage and redirty the page.
+ */
+
+STATIC int
+xfs_vm_writepage(
+	struct page		*page,
+	struct writeback_control *wbc)
+{
+	int			error;
+	int			need_trans;
+	int			delalloc, unmapped, unwritten;
+	struct inode		*inode = page->mapping->host;
+
+	xfs_page_trace(XFS_WRITEPAGE_ENTER, inode, page, 0);
+
+	/*
+	 * We need a transaction if:
+	 *  1. There are delalloc buffers on the page
+	 *  2. The page is uptodate and we have unmapped buffers
+	 *  3. The page is uptodate and we have no buffers
+	 *  4. There are unwritten buffers on the page
+	 */
+
+	if (!page_has_buffers(page)) {
+		unmapped = 1;
+		need_trans = 1;
+	} else {
+		xfs_count_page_state(page, &delalloc, &unmapped, &unwritten);
+		if (!PageUptodate(page))
+			unmapped = 0;
+		need_trans = delalloc + unmapped + unwritten;
+	}
+
+	/*
+	 * If we need a transaction and the process flags say
+	 * we are already in a transaction, or no IO is allowed
+	 * then mark the page dirty again and leave the page
+	 * as is.
+	 */
+	if (PFLAGS_TEST_FSTRANS() && need_trans)
+		goto out_fail;
+
+	/*
+	 * Delay hooking up buffer heads until we have
+	 * made our go/no-go decision.
+	 */
+	if (!page_has_buffers(page))
+		create_empty_buffers(page, 1 << inode->i_blkbits, 0);
+
+	/*
+	 * Convert delayed allocate, unwritten or unmapped space
+	 * to real space and flush out to disk.
+	 */
+	error = xfs_page_state_convert(inode, page, wbc, 1, unmapped);
+	if (error == -EAGAIN)
+		goto out_fail;
+	if (unlikely(error < 0))
+		goto out_unlock;
+
+	return 0;
+
+out_fail:
+	redirty_page_for_writepage(wbc, page);
+	unlock_page(page);
+	return 0;
+out_unlock:
+	unlock_page(page);
+	return error;
+}
+
+/*
+ * Called to move a page into cleanable state - and from there
+ * to be released. Possibly the page is already clean. We always
+ * have buffer heads in this call.
+ *
+ * Returns 0 if the page is ok to release, 1 otherwise.
+ *
+ * Possible scenarios are:
+ *
+ * 1. We are being called to release a page which has been written
+ *    to via regular I/O. buffer heads will be dirty and possibly
+ *    delalloc. If no delalloc buffer heads in this case then we
+ *    can just return zero.
+ *
+ * 2. We are called to release a page which has been written via
+ *    mmap, all we need to do is ensure there is no delalloc
+ *    state in the buffer heads, if not we can let the caller
+ *    free them and we should come back later via writepage.
+ */
 STATIC int
-__linvfs_get_block(
+xfs_vm_releasepage(
+	struct page		*page,
+	gfp_t			gfp_mask)
+{
+	struct inode		*inode = page->mapping->host;
+	int			dirty, delalloc, unmapped, unwritten;
+	struct writeback_control wbc = {
+		.sync_mode = WB_SYNC_ALL,
+		.nr_to_write = 1,
+	};
+
+	xfs_page_trace(XFS_RELEASEPAGE_ENTER, inode, page, gfp_mask);
+
+	if (!page_has_buffers(page))
+		return 0;
+
+	xfs_count_page_state(page, &delalloc, &unmapped, &unwritten);
+	if (!delalloc && !unwritten)
+		goto free_buffers;
+
+	if (!(gfp_mask & __GFP_FS))
+		return 0;
+
+	/* If we are already inside a transaction or the thread cannot
+	 * do I/O, we cannot release this page.
+	 */
+	if (PFLAGS_TEST_FSTRANS())
+		return 0;
+
+	/*
+	 * Convert delalloc space to real space, do not flush the
+	 * data out to disk, that will be done by the caller.
+	 * Never need to allocate space here - we will always
+	 * come back to writepage in that case.
+	 */
+	dirty = xfs_page_state_convert(inode, page, &wbc, 0, 0);
+	if (dirty == 0 && !unwritten)
+		goto free_buffers;
+	return 0;
+
+free_buffers:
+	return try_to_free_buffers(page);
+}
+
+STATIC int
+__xfs_get_block(
 	struct inode		*inode,
 	sector_t		iblock,
 	unsigned long		blocks,
@@ -1050,7 +1232,7 @@ __linvfs_get_block(
 	int			direct,
 	bmapi_flags_t		flags)
 {
-	vnode_t			*vp = LINVFS_GET_VP(inode);
+	vnode_t			*vp = vn_from_inode(inode);
 	xfs_iomap_t		iomap;
 	xfs_off_t		offset;
 	ssize_t			size;
@@ -1073,21 +1255,13 @@ __linvfs_get_block(
 		return 0;
 
 	if (iomap.iomap_bn != IOMAP_DADDR_NULL) {
-		xfs_daddr_t	bn;
-		xfs_off_t	delta;
-
-		/* For unwritten extents do not report a disk address on
+		/*
+		 * For unwritten extents do not report a disk address on
 		 * the read case (treat as if we're reading into a hole).
 		 */
 		if (create || !(iomap.iomap_flags & IOMAP_UNWRITTEN)) {
-			delta = offset - iomap.iomap_offset;
-			delta >>= inode->i_blkbits;
-
-			bn = iomap.iomap_bn >> (inode->i_blkbits - BBSHIFT);
-			bn += delta;
-			BUG_ON(!bn && !(iomap.iomap_flags & IOMAP_REALTIME));
-			bh_result->b_blocknr = bn;
-			set_buffer_mapped(bh_result);
+			xfs_map_buffer(bh_result, &iomap, offset,
+				       inode->i_blkbits);
 		}
 		if (create && (iomap.iomap_flags & IOMAP_UNWRITTEN)) {
 			if (direct)
@@ -1130,30 +1304,30 @@ __linvfs_get_block(
 }
 
 int
-linvfs_get_block(
+xfs_get_block(
 	struct inode		*inode,
 	sector_t		iblock,
 	struct buffer_head	*bh_result,
 	int			create)
 {
-	return __linvfs_get_block(inode, iblock, 0, bh_result,
+	return __xfs_get_block(inode, iblock, 0, bh_result,
 					create, 0, BMAPI_WRITE);
 }
 
 STATIC int
-linvfs_get_blocks_direct(
+xfs_get_blocks_direct(
 	struct inode		*inode,
 	sector_t		iblock,
 	unsigned long		max_blocks,
 	struct buffer_head	*bh_result,
 	int			create)
 {
-	return __linvfs_get_block(inode, iblock, max_blocks, bh_result,
+	return __xfs_get_block(inode, iblock, max_blocks, bh_result,
 					create, 1, BMAPI_WRITE|BMAPI_DIRECT);
 }
 
 STATIC void
-linvfs_end_io_direct(
+xfs_end_io_direct(
 	struct kiocb	*iocb,
 	loff_t		offset,
 	ssize_t		size,
@@ -1191,7 +1365,7 @@ linvfs_end_io_direct(
 }
 
 STATIC ssize_t
-linvfs_direct_IO(
+xfs_vm_direct_IO(
 	int			rw,
 	struct kiocb		*iocb,
 	const struct iovec	*iov,
@@ -1200,7 +1374,7 @@ linvfs_direct_IO(
 {
 	struct file	*file = iocb->ki_filp;
 	struct inode	*inode = file->f_mapping->host;
-	vnode_t		*vp = LINVFS_GET_VP(inode);
+	vnode_t		*vp = vn_from_inode(inode);
 	xfs_iomap_t	iomap;
 	int		maps = 1;
 	int		error;
@@ -1215,164 +1389,61 @@ linvfs_direct_IO(
 	ret = blockdev_direct_IO_own_locking(rw, iocb, inode,
 		iomap.iomap_target->bt_bdev,
 		iov, offset, nr_segs,
-		linvfs_get_blocks_direct,
-		linvfs_end_io_direct);
+		xfs_get_blocks_direct,
+		xfs_end_io_direct);
 
 	if (unlikely(ret <= 0 && iocb->private))
 		xfs_destroy_ioend(iocb->private);
 	return ret;
 }
 
+STATIC int
+xfs_vm_prepare_write(
+	struct file		*file,
+	struct page		*page,
+	unsigned int		from,
+	unsigned int		to)
+{
+	return block_prepare_write(page, from, to, xfs_get_block);
+}
 
 STATIC sector_t
-linvfs_bmap(
+xfs_vm_bmap(
 	struct address_space	*mapping,
 	sector_t		block)
 {
 	struct inode		*inode = (struct inode *)mapping->host;
-	vnode_t			*vp = LINVFS_GET_VP(inode);
+	vnode_t			*vp = vn_from_inode(inode);
 	int			error;
 
-	vn_trace_entry(vp, "linvfs_bmap", (inst_t *)__return_address);
+	vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
 
 	VOP_RWLOCK(vp, VRWLOCK_READ);
 	VOP_FLUSH_PAGES(vp, (xfs_off_t)0, -1, 0, FI_REMAPF, error);
 	VOP_RWUNLOCK(vp, VRWLOCK_READ);
-	return generic_block_bmap(mapping, block, linvfs_get_block);
+	return generic_block_bmap(mapping, block, xfs_get_block);
 }
 
 STATIC int
-linvfs_readpage(
+xfs_vm_readpage(
 	struct file		*unused,
 	struct page		*page)
 {
-	return mpage_readpage(page, linvfs_get_block);
+	return mpage_readpage(page, xfs_get_block);
 }
 
 STATIC int
-linvfs_readpages(
+xfs_vm_readpages(
 	struct file		*unused,
 	struct address_space	*mapping,
 	struct list_head	*pages,
 	unsigned		nr_pages)
 {
-	return mpage_readpages(mapping, pages, nr_pages, linvfs_get_block);
-}
-
-STATIC void
-xfs_count_page_state(
-	struct page		*page,
-	int			*delalloc,
-	int			*unmapped,
-	int			*unwritten)
-{
-	struct buffer_head	*bh, *head;
-
-	*delalloc = *unmapped = *unwritten = 0;
-
-	bh = head = page_buffers(page);
-	do {
-		if (buffer_uptodate(bh) && !buffer_mapped(bh))
-			(*unmapped) = 1;
-		else if (buffer_unwritten(bh) && !buffer_delay(bh))
-			clear_buffer_unwritten(bh);
-		else if (buffer_unwritten(bh))
-			(*unwritten) = 1;
-		else if (buffer_delay(bh))
-			(*delalloc) = 1;
-	} while ((bh = bh->b_this_page) != head);
+	return mpage_readpages(mapping, pages, nr_pages, xfs_get_block);
 }
 
-
-/*
- * writepage: Called from one of two places:
- *
- * 1. we are flushing a delalloc buffer head.
- *
- * 2. we are writing out a dirty page. Typically the page dirty
- *    state is cleared before we get here. In this case is it
- *    conceivable we have no buffer heads.
- *
- * For delalloc space on the page we need to allocate space and
- * flush it. For unmapped buffer heads on the page we should
- * allocate space if the page is uptodate. For any other dirty
- * buffer heads on the page we should flush them.
- *
- * If we detect that a transaction would be required to flush
- * the page, we have to check the process flags first, if we
- * are already in a transaction or disk I/O during allocations
- * is off, we need to fail the writepage and redirty the page.
- */
-
 STATIC int
-linvfs_writepage(
-	struct page		*page,
-	struct writeback_control *wbc)
-{
-	int			error;
-	int			need_trans;
-	int			delalloc, unmapped, unwritten;
-	struct inode		*inode = page->mapping->host;
-
-	xfs_page_trace(XFS_WRITEPAGE_ENTER, inode, page, 0);
-
-	/*
-	 * We need a transaction if:
-	 *  1. There are delalloc buffers on the page
-	 *  2. The page is uptodate and we have unmapped buffers
-	 *  3. The page is uptodate and we have no buffers
-	 *  4. There are unwritten buffers on the page
-	 */
-
-	if (!page_has_buffers(page)) {
-		unmapped = 1;
-		need_trans = 1;
-	} else {
-		xfs_count_page_state(page, &delalloc, &unmapped, &unwritten);
-		if (!PageUptodate(page))
-			unmapped = 0;
-		need_trans = delalloc + unmapped + unwritten;
-	}
-
-	/*
-	 * If we need a transaction and the process flags say
-	 * we are already in a transaction, or no IO is allowed
-	 * then mark the page dirty again and leave the page
-	 * as is.
-	 */
-	if (PFLAGS_TEST_FSTRANS() && need_trans)
-		goto out_fail;
-
-	/*
-	 * Delay hooking up buffer heads until we have
-	 * made our go/no-go decision.
-	 */
-	if (!page_has_buffers(page))
-		create_empty_buffers(page, 1 << inode->i_blkbits, 0);
-
-	/*
-	 * Convert delayed allocate, unwritten or unmapped space
-	 * to real space and flush out to disk.
-	 */
-	error = xfs_page_state_convert(inode, page, wbc, 1, unmapped);
-	if (error == -EAGAIN)
-		goto out_fail;
-	if (unlikely(error < 0))
-		goto out_unlock;
-
-	return 0;
-
-out_fail:
-	redirty_page_for_writepage(wbc, page);
-	unlock_page(page);
-	return 0;
-out_unlock:
-	unlock_page(page);
-	return error;
-}
-
-STATIC int
-linvfs_invalidate_page(
+xfs_vm_invalidatepage(
 	struct page		*page,
 	unsigned long		offset)
 {
@@ -1381,87 +1452,16 @@ linvfs_invalidate_page(
 	return block_invalidatepage(page, offset);
 }
 
-/*
- * Called to move a page into cleanable state - and from there
- * to be released. Possibly the page is already clean. We always
- * have buffer heads in this call.
- *
- * Returns 0 if the page is ok to release, 1 otherwise.
- *
- * Possible scenarios are:
- *
- * 1. We are being called to release a page which has been written
- *    to via regular I/O. buffer heads will be dirty and possibly
- *    delalloc. If no delalloc buffer heads in this case then we
- *    can just return zero.
- *
- * 2. We are called to release a page which has been written via
- *    mmap, all we need to do is ensure there is no delalloc
- *    state in the buffer heads, if not we can let the caller
- *    free them and we should come back later via writepage.
- */
-STATIC int
-linvfs_release_page(
-	struct page		*page,
-	gfp_t			gfp_mask)
-{
-	struct inode		*inode = page->mapping->host;
-	int			dirty, delalloc, unmapped, unwritten;
-	struct writeback_control wbc = {
-		.sync_mode = WB_SYNC_ALL,
-		.nr_to_write = 1,
-	};
-
-	xfs_page_trace(XFS_RELEASEPAGE_ENTER, inode, page, gfp_mask);
-
-	xfs_count_page_state(page, &delalloc, &unmapped, &unwritten);
-	if (!delalloc && !unwritten)
-		goto free_buffers;
-
-	if (!(gfp_mask & __GFP_FS))
-		return 0;
-
-	/* If we are already inside a transaction or the thread cannot
-	 * do I/O, we cannot release this page.
-	 */
-	if (PFLAGS_TEST_FSTRANS())
-		return 0;
-
-	/*
-	 * Convert delalloc space to real space, do not flush the
-	 * data out to disk, that will be done by the caller.
-	 * Never need to allocate space here - we will always
-	 * come back to writepage in that case.
-	 */
-	dirty = xfs_page_state_convert(inode, page, &wbc, 0, 0);
-	if (dirty == 0 && !unwritten)
-		goto free_buffers;
-	return 0;
-
-free_buffers:
-	return try_to_free_buffers(page);
-}
-
-STATIC int
-linvfs_prepare_write(
-	struct file		*file,
-	struct page		*page,
-	unsigned int		from,
-	unsigned int		to)
-{
-	return block_prepare_write(page, from, to, linvfs_get_block);
-}
-
-struct address_space_operations linvfs_aops = {
-	.readpage		= linvfs_readpage,
-	.readpages		= linvfs_readpages,
-	.writepage		= linvfs_writepage,
+struct address_space_operations xfs_address_space_operations = {
+	.readpage		= xfs_vm_readpage,
+	.readpages		= xfs_vm_readpages,
+	.writepage		= xfs_vm_writepage,
 	.sync_page		= block_sync_page,
-	.releasepage		= linvfs_release_page,
-	.invalidatepage		= linvfs_invalidate_page,
-	.prepare_write		= linvfs_prepare_write,
+	.releasepage		= xfs_vm_releasepage,
+	.invalidatepage		= xfs_vm_invalidatepage,
+	.prepare_write		= xfs_vm_prepare_write,
 	.commit_write		= generic_commit_write,
-	.bmap			= linvfs_bmap,
-	.direct_IO		= linvfs_direct_IO,
+	.bmap			= xfs_vm_bmap,
+	.direct_IO		= xfs_vm_direct_IO,
 	.migratepage		= buffer_migrate_page,
 };
diff --git a/fs/xfs/linux-2.6/xfs_aops.h b/fs/xfs/linux-2.6/xfs_aops.h
index 55339dd5a30d..795699f121d2 100644
--- a/fs/xfs/linux-2.6/xfs_aops.h
+++ b/fs/xfs/linux-2.6/xfs_aops.h
@@ -40,7 +40,7 @@ typedef struct xfs_ioend {
 	struct work_struct	io_work;	/* xfsdatad work queue */
 } xfs_ioend_t;
 
-extern struct address_space_operations linvfs_aops;
-extern int linvfs_get_block(struct inode *, sector_t, struct buffer_head *, int);
+extern struct address_space_operations xfs_address_space_operations;
+extern int xfs_get_block(struct inode *, sector_t, struct buffer_head *, int);
 
 #endif /* __XFS_IOPS_H__ */
diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c
index bfb4f2917bb6..9fb0312665ca 100644
--- a/fs/xfs/linux-2.6/xfs_buf.c
+++ b/fs/xfs/linux-2.6/xfs_buf.c
@@ -29,6 +29,7 @@
 #include <linux/blkdev.h>
 #include <linux/hash.h>
 #include <linux/kthread.h>
+#include <linux/migrate.h>
 #include "xfs_linux.h"
 
 STATIC kmem_zone_t *xfs_buf_zone;
@@ -1805,13 +1806,12 @@ xfs_flush_buftarg(
 int __init
 xfs_buf_init(void)
 {
-	int		error = -ENOMEM;
-
 #ifdef XFS_BUF_TRACE
 	xfs_buf_trace_buf = ktrace_alloc(XFS_BUF_TRACE_SIZE, KM_SLEEP);
 #endif
 
-	xfs_buf_zone = kmem_zone_init(sizeof(xfs_buf_t), "xfs_buf");
+	xfs_buf_zone = kmem_zone_init_flags(sizeof(xfs_buf_t), "xfs_buf",
+						KM_ZONE_HWALIGN, NULL);
 	if (!xfs_buf_zone)
 		goto out_free_trace_buf;
 
@@ -1839,7 +1839,7 @@ xfs_buf_init(void)
 #ifdef XFS_BUF_TRACE
 	ktrace_free(xfs_buf_trace_buf);
 #endif
-	return error;
+	return -ENOMEM;
 }
 
 void
diff --git a/fs/xfs/linux-2.6/xfs_export.c b/fs/xfs/linux-2.6/xfs_export.c
index 80eb249f2fa0..b768ea910bbe 100644
--- a/fs/xfs/linux-2.6/xfs_export.c
+++ b/fs/xfs/linux-2.6/xfs_export.c
@@ -25,6 +25,8 @@
 #include "xfs_mount.h"
 #include "xfs_export.h"
 
+STATIC struct dentry dotdot = { .d_name.name = "..", .d_name.len = 2, };
+
 /*
  * XFS encodes and decodes the fileid portion of NFS filehandles
  * itself instead of letting the generic NFS code do it.  This
@@ -37,7 +39,7 @@
  */
 
 STATIC struct dentry *
-linvfs_decode_fh(
+xfs_fs_decode_fh(
 	struct super_block	*sb,
 	__u32			*fh,
 	int			fh_len,
@@ -78,12 +80,12 @@ linvfs_decode_fh(
 	}
 
 	fh = (__u32 *)&ifid;
-	return find_exported_dentry(sb, fh, parent, acceptable, context);
+	return sb->s_export_op->find_exported_dentry(sb, fh, parent, acceptable, context);
 }
 
 
 STATIC int
-linvfs_encode_fh(
+xfs_fs_encode_fh(
 	struct dentry		*dentry,
 	__u32			*fh,
 	int			*max_len,
@@ -95,7 +97,7 @@ linvfs_encode_fh(
 	int			len;
 	int			is64 = 0;
 #if XFS_BIG_INUMS
-	vfs_t			*vfs = LINVFS_GET_VFS(inode->i_sb);
+	vfs_t			*vfs = vfs_from_sb(inode->i_sb);
 
 	if (!(vfs->vfs_flag & VFS_32BITINODES)) {
 		/* filesystem may contain 64bit inode numbers */
@@ -130,21 +132,21 @@ linvfs_encode_fh(
 }
 
 STATIC struct dentry *
-linvfs_get_dentry(
+xfs_fs_get_dentry(
 	struct super_block	*sb,
 	void			*data)
 {
 	vnode_t			*vp;
 	struct inode		*inode;
 	struct dentry		*result;
-	vfs_t			*vfsp = LINVFS_GET_VFS(sb);
+	vfs_t			*vfsp = vfs_from_sb(sb);
 	int			error;
 
 	VFS_VGET(vfsp, &vp, (fid_t *)data, error);
 	if (error || vp == NULL)
 		return ERR_PTR(-ESTALE) ;
 
-	inode = LINVFS_GET_IP(vp);
+	inode = vn_to_inode(vp);
 	result = d_alloc_anon(inode);
         if (!result) {
 		iput(inode);
@@ -154,25 +156,20 @@ linvfs_get_dentry(
 }
 
 STATIC struct dentry *
-linvfs_get_parent(
+xfs_fs_get_parent(
 	struct dentry		*child)
 {
 	int			error;
 	vnode_t			*vp, *cvp;
 	struct dentry		*parent;
-	struct dentry		dotdot;
-
-	dotdot.d_name.name = "..";
-	dotdot.d_name.len = 2;
-	dotdot.d_inode = NULL;
 
 	cvp = NULL;
-	vp = LINVFS_GET_VP(child->d_inode);
+	vp = vn_from_inode(child->d_inode);
 	VOP_LOOKUP(vp, &dotdot, &cvp, 0, NULL, NULL, error);
 	if (unlikely(error))
 		return ERR_PTR(-error);
 
-	parent = d_alloc_anon(LINVFS_GET_IP(cvp));
+	parent = d_alloc_anon(vn_to_inode(cvp));
 	if (unlikely(!parent)) {
 		VN_RELE(cvp);
 		return ERR_PTR(-ENOMEM);
@@ -180,9 +177,9 @@ linvfs_get_parent(
 	return parent;
 }
 
-struct export_operations linvfs_export_ops = {
-	.decode_fh		= linvfs_decode_fh,
-	.encode_fh		= linvfs_encode_fh,
-	.get_parent		= linvfs_get_parent,
-	.get_dentry		= linvfs_get_dentry,
+struct export_operations xfs_export_operations = {
+	.decode_fh		= xfs_fs_decode_fh,
+	.encode_fh		= xfs_fs_encode_fh,
+	.get_parent		= xfs_fs_get_parent,
+	.get_dentry		= xfs_fs_get_dentry,
 };
diff --git a/fs/xfs/linux-2.6/xfs_file.c b/fs/xfs/linux-2.6/xfs_file.c
index ced4404339c7..185567a6a561 100644
--- a/fs/xfs/linux-2.6/xfs_file.c
+++ b/fs/xfs/linux-2.6/xfs_file.c
@@ -43,13 +43,13 @@
 #include <linux/dcache.h>
 #include <linux/smp_lock.h>
 
-static struct vm_operations_struct linvfs_file_vm_ops;
+static struct vm_operations_struct xfs_file_vm_ops;
 #ifdef CONFIG_XFS_DMAPI
-static struct vm_operations_struct linvfs_dmapi_file_vm_ops;
+static struct vm_operations_struct xfs_dmapi_file_vm_ops;
 #endif
 
 STATIC inline ssize_t
-__linvfs_read(
+__xfs_file_read(